UIWebView

返回按钮

 if ([self.webView canGoBack]) {//判断能否返回
        [self.webView goBack];//返回
    }

获取页面title

- (void)webViewDidFinishLoad:(UIWebView *)webView{
 NSString *title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
 self.titlelabel.text = title;

}